Portable drag-saw machine.



E. VAUGHAN. PORTABLE DRAG SAW MACHINE.

AiPLlCATION FILED NOV. 26, 1913.

Patented Dec. 21, 1915.

2 SHEETS-SHEET I.

APPLICATION FILED NOV. 26, I9I3- Patented Dec. 21, 1915.

2 SHEETS-SHEET 2- ELIBERT VAUGHAN, 0F PORTLAND; OREGON.

PORTABLE DRAG-SAW MACHINE.

' Specification of Letters Patent.

Patented Dee. 21, 1915.

Application filed November 26, 1913. Serial No. 803,230.

To all whom it may concern Be it known that I, ELBERT VAUGHAN, a citizenof the United States, residing at Portland, in the county of Multnomahand State of Oregon, have invented new and useful Improvements inPortable Drag-Saw Machines, of which the following is a-specication.

The invention relates generally to dragsaw machines, and particularly toa portable motor-driven machine of this type in which the parts arearranged for particular efliciency and durabilityn V The main object ofthe present invention is the provision of a drag-saw machine embodying aframe having a single point of support remote from the log and spacedpoints of connection to the log, the saw proper being mountedin a frameoperated from the motor and given a tilting motion during the sawingoperation to aid in clearing the saw-dust. from the saw cut.

The invention in the preferred form of details will be described in thefollowing specification, reference being had particularly to theaccompanying drawings, in which Figure 1 is a side elevation of theimproved drag-saw machine. of the same. Fig. 3 is a section on line 3-3of Fig. 1. Fig. 4 is a section on line 44 of Fig. 2. Fig. 5 is aperspective view of block, the beams 1 being preferably arranged atright angles to the block and the beam 2 at an angle to the beam 1, asclearly shown in the drawings. A transverse brace bar 5 is arrangedintermediate the beams, and a supporting bar 6 is terminally connectedto the brace bar 5and to the beam 2, said bar 6 forming a support forthe motor, shown in this instance as a gasolene engine 7.

Secured upon the upper edges of the respective beams 1 and 2 in advanceof the ground block 4 are bearing plates 8, preferably mounted forlimited adjustment lon- Fig. 2 is a plan gitudinally of the beamsthrough slots 9 formed in the plates to receive the connected bolts 10.Mounted in the bearing plates 8 is the driven shaft 11 on which andbetween the beams, and adjacent the beam 1 is fixed a sprocket wheel 12.A chain 13 "connects.

the. sprocket wheel 12 with a sprocket pinion l4 operated directly bythe motor 7 whereby motion is imparted to the shaft 11 from themotor.The main shaft 15 of the motor is provided with a conical extensionl6=to receive the fly wheel 17, the shaft beyond the extension beingthreaded at 18 to receive What may be termed a cone-clutch member 19 onwhich is mounted the pinion 14, the spring 20' encircling the extensionof the cone-clutch member and bearing against the pinion to normallymaintain said pinion in driving cooperation with the shaft to the motor,while. at the same time permitting an undue strain upon the saw to causea saw. A nut 21 threaded upon the end of the extension of the clutchmember 19 holds the spring to its duty.

Secured upon and arranged eccentrically Witli relation to the shaft 11is a disk 22 on the periphery of which is arranged aneccentrio strap 23having an upstanding projection 24 and spaced forwardly projecting means25 rigidly secured thereto. A guide frame of which the eccentric strapforms a part is provided including a lower guide bar 26 rigidly securedat one end between the cars 25 and an upper guide bar '27 fixed at itsrear end on the projection 24. The forward end of the bars 26 and 27 aresecured in a bracket including an upright member 28 formed with openings29 to receive the forward 'ends of the guide bars, fastening means 30being provided for SQCIIIIIIO the guide bars from the bracket. Thebracket is urther provided with an outwardly extending lateral arm 31 towhich is secured a saw guide comprising a block 32 formed with a sawreceiving channel 33, the arm 31 extending outwardly beyond the blockfor a purpose which will later appear. The bracket is also formed withan inwardly disposed depending lug 34 designed to cooperate with thestrip 35 secured upon the upper end of the frame bar 1, whereby toprovide for elevating the 'frame and holding it elevated during thetransportation .of the machinefrom one position to another. Slidablymounted upon the guide bars 26 and 27 slip of the pinion to avoidbreakage of the 36 formed with a rearwar is a saw carrier comprising ametallic plate ly extending lug 37 havinga longitudinally arrangedopening '38 therein to slidably receive the upper guide bar 27, saidplate being further provided adjacent its lowerend with spaced 7 lugs 39formed with openings 10 to cooperate with the lower guide bar 26. Thecarrier is thus slidably held upon the frame and if desired the openingsin the respective lugs may be of such size as to receive elongatedsleeves to slidably engage the guide bars andthe lug 87 with itsthreaded terminal engaged by a nut 16 beyond thelug. By thisconstructionthe saw blade is clamped between'the hook 44 and'the lugs 41, as will beobvious. The carrier is also provided with a laterally extending pin 17to receive one end of a connecting rod 48 the opposite end of which isconnected to a crank 49 formed on the shaft 11, whereby in therotationof the shaft the carrier is reciprocated 011 the guide frame.The forward ends of the beams 1 and 2 are provided with lug engaginghooks 50 terminally mounted on pins 51 secured in the beams, brackets 52secured to the beams in rear of the bolts 51 being formed at theirforward ends with openings to fit over the pins 51 beyond the hooks. Theforward terminals of the hooks are formed to provide spur engaging pins53,: peculiarly shaped in that their relatively inner upright edgesincline inwardly from-a line at right angles to the main. length of thehook, so that the terminal point of the spur is inwardly beyond suchright angle line. Bythis means as the hook is driven into the log itexerts a wedging or holding action to bind the adjacent end of the beamonto the log and secure the machine to the log during the sawingoperation. It will be evident that as shown in the drawings that Iprovide the relatively inner side of each of the beams 1 and 2 with oneof the log engaging hooks, so that the forward ends of both beams areanchored to the log being limits of its stroke to more readily perfectaclearness. In elevating the saw for adjustment or the like theextension of the arm 31 of the bracket provides a convenient hand-hold.

,What is claimed is A saw guide and carrier for drag saw machinesincluding guide rods, a plate having rearwardly extending lugs formedwith openings to slidably receive the guide rods, the face of the platehaving spaced lugs to receive the upper edge of the saw and secure thesame between the plate and lugs, the lower edge of the plate beingrecessed and a. rod mounted for threaded adjustment relative to theplate and terminating in a hook, said hook being operative in the recessof the plate to project the bill of the hook on the same side of theplate as the lugs, the

- hook engaging the lower edge of the saw.

In testimony whereof I affix my signature in presence of two witnesses.

. ELBERT VAUGHAN;

